Colts running back Donald Brown (31) leaps over teammate offensive tackle Anthony Castonzo during the third quarter against San Francisco. Sept. 22, 2013

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What was said in and around the Indianapolis Colts' locker room Friday:Brown backing up

The temporary loss of RB Ahmad Bradshaw (neck) not only means Trent Richardson makes his first start as a member of the Colts on Sunday at Jacksonville, but it moves Donald Brown into the backup role.

Brown's playing time has been limited through three games, but he has averaged 5.5 yards on 10 carries, best among the team's running backs. While his production on the ground has been solid, one play that sticks out is Brown's inability to pass protect on fourth-and-10 at the Miami 23-yard line late in the fourth ...